Operating Instructions

Chapter 4 - Parameters and Menu Structure
Parameters (M3)
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Siemens Industry, Inc.
Siemens BT300 HVAC Drive
DPD01809
Smart Infrastructure
2019-05-29
Figure 24: Automatic reset function.
Timer Functions (M3.11)
The timer functions (time channels) in the BT300 drive allow you to program functions to be controlled by the
internal RTC (Real Time Clock). Almost every function that can be controlled by a digital input can also be
controlled by a time channel. Instead of having an external PLC or Field Panel controlling a digital input, you
can internally program the closed and opened intervals of the input.
Time Channels
The on/off logic for the time channels is configured by assigning intervals and/or timers to them. One time
channel can be controlled by many intervals or timers by assigning as many of these as needed to the time
channel.
Intervals
Every interval is given an ON Time and OFF Time. This is the daily time that the interval will be active during
the days set with From Day and To Day. For example, the settings below indicate that the interval is active
from 7:00 A.M. to 9:00 A.M. every weekday (Monday through Friday). The time channel this interval is
assigned to will be seen as a closed virtual digital input during that period.
ON Time: 07:00:00
OFF Time: 09:00:00
From Day: Monday
To Day: Friday